#**************************************************************************
#*                                                                        *
#*                                 OCaml                                  *
#*                                                                        *
#*            Xavier Leroy, projet Cristal, INRIA Rocquencourt            *
#*                                                                        *
#*   Copyright 1999 Institut National de Recherche en Informatique et     *
#*     en Automatique.                                                    *
#*                                                                        *
#*   All rights reserved.  This file is distributed under the terms of    *
#*   the GNU Lesser General Public License version 2.1, with the          *
#*   special exception on linking described in the file LICENSE.          *
#*                                                                        *
#**************************************************************************

ROOTDIR=../..

include $(ROOTDIR)/Makefile.common
include $(ROOTDIR)/Makefile.best_binaries

ifneq "$(CCOMPTYPE)" "msvc"
OC_CFLAGS += -g
endif

OC_CFLAGS += $(SHAREDLIB_CFLAGS)

OC_CPPFLAGS += -I$(ROOTDIR)/runtime

NATIVE_CPPFLAGS = \
  -DNATIVE_CODE -DTARGET_$(ARCH) -DMODEL_$(MODEL) -DSYS_$(SYSTEM)

LIBS = -nostdlib -I $(ROOTDIR)/stdlib -I $(ROOTDIR)/otherlibs/$(UNIXLIB)

CAMLC=$(BEST_OCAMLC) $(LIBS)
CAMLOPT=$(BEST_OCAMLOPT) $(LIBS)

MKLIB=$(OCAMLRUN) $(ROOTDIR)/tools/ocamlmklib$(EXE)
COMPFLAGS=-w +33..39 -warn-error +A -g -bin-annot -safe-string
ifeq "$(FLAMBDA)" "true"
OPTCOMPFLAGS += -O3
endif

LIBNAME=threads

# Note: the header on which object files produced from st_stubs.c
# should actually depend is known for sure only at compile-time.
# That's why this dependency is handled in the Makefile directly
# and removed from the output of the C compiler during make depend

BYTECODE_C_OBJS=st_stubs.b.$(O)
NATIVECODE_C_OBJS=st_stubs.n.$(O)

THREADS_SOURCES = thread.ml mutex.ml condition.ml event.ml threadUnix.ml \
  semaphore.ml

THREADS_BCOBJS = $(THREADS_SOURCES:.ml=.cmo)
THREADS_NCOBJS = $(THREADS_SOURCES:.ml=.cmx)

MLIFILES=thread.mli mutex.mli condition.mli event.mli threadUnix.mli \
  semaphore.mli

CMIFILES=$(MLIFILES:.mli=.cmi)

all: lib$(LIBNAME).$(A) $(LIBNAME).cma $(CMIFILES)

allopt: lib$(LIBNAME)nat.$(A) $(LIBNAME).cmxa $(CMIFILES)

lib$(LIBNAME).$(A): $(BYTECODE_C_OBJS)
	$(MKLIB_CMD) -o $(LIBNAME) $(BYTECODE_C_OBJS) $(PTHREAD_LIBS)

lib$(LIBNAME)nat.$(A): $(NATIVECODE_C_OBJS)
	$(MKLIB_CMD) -o $(LIBNAME)nat $^

$(LIBNAME).cma: $(THREADS_BCOBJS)
ifeq "$(UNIX_OR_WIN32)" "unix"
	$(MKLIB) -o $(LIBNAME) -ocamlc '$(CAMLC)' -cclib -lunix -linkall \
	  $(PTHREAD_CAML_LIBS) $^
# TODO: Figure out why -cclib -lunix is used here.
# It may be because of the threadsUnix module which is deprecated.
# It may hence be good to figure out whether this module shouldn't be
# removed, and then -cclib -lunix arguments.
else # Windows
	$(MKLIB) -o $(LIBNAME) -ocamlc "$(CAMLC)" -linkall \
	  $(PTHREAD_CAML_LIBS) $^
endif

# See remark above: force static linking of libthreadsnat.a
$(LIBNAME).cmxa: $(THREADS_NCOBJS)
	$(CAMLOPT) -linkall -a -cclib -lthreadsnat $(PTHREAD_CAML_LIBS) -o $@ $^

# Note: I removed "-cclib -lunix" from the line above.
# Indeed, if we link threads.cmxa, then we must also link unix.cmxa,
# which itself will pass -lunix to the C linker.  It seems more
# modular to me this way. -- Alain

# The following lines produce two object files st_stubs.b.$(O) and
# st_stubs.n.$(O) from the same source file st_stubs.c (it is compiled
# twice, each time with different options).

st_stubs.n.$(O): OC_CPPFLAGS += $(NATIVE_CPPFLAGS)

ifneq "$(COMPUTE_DEPS)" "false"
st_stubs.%.$(O): st_stubs.c
else
st_stubs.%.$(O): st_stubs.c $(RUNTIME_HEADERS) $(wildcard *.h)
endif
	$(CC) -c $(OC_CFLAGS) $(CFLAGS) $(OC_CPPFLAGS) $(CPPFLAGS) \
	  $(OUTPUTOBJ)$@ $<

partialclean:
	rm -f *.cm*

clean: partialclean
	rm -f dllthreads*.so dllthreads*.dll *.a *.lib *.o *.obj
	rm -rf $(DEPDIR)

INSTALL_THREADSLIBDIR=$(INSTALL_LIBDIR)/$(LIBNAME)

install:
	if test -f dllthreads$(EXT_DLL); then \
	  $(INSTALL_PROG) dllthreads$(EXT_DLL) "$(INSTALL_STUBLIBDIR)"; \
	fi
	$(INSTALL_DATA) libthreads.$(A) "$(INSTALL_LIBDIR)"
	cd "$(INSTALL_LIBDIR)"; $(RANLIB) libthreads.$(A)
	mkdir -p "$(INSTALL_THREADSLIBDIR)"
	$(INSTALL_DATA) \
	  $(CMIFILES) threads.cma \
	  "$(INSTALL_THREADSLIBDIR)"
ifeq "$(INSTALL_SOURCE_ARTIFACTS)" "true"
	$(INSTALL_DATA) \
	  $(CMIFILES:.cmi=.cmti) \
	  "$(INSTALL_THREADSLIBDIR)"
	$(INSTALL_DATA) $(MLIFILES) "$(INSTALL_THREADSLIBDIR)"
endif
	$(INSTALL_DATA) threads.h "$(INSTALL_LIBDIR)/caml"

installopt:
	$(INSTALL_DATA) libthreadsnat.$(A) "$(INSTALL_LIBDIR)"
	cd "$(INSTALL_LIBDIR)"; $(RANLIB) libthreadsnat.$(A)
	$(INSTALL_DATA) \
	  $(THREADS_NCOBJS) threads.cmxa threads.$(A) \
	  "$(INSTALL_THREADSLIBDIR)"
	cd "$(INSTALL_THREADSLIBDIR)" && $(RANLIB) threads.$(A)

%.cmi: %.mli
	$(CAMLC) -c $(COMPFLAGS) $<

%.cmo: %.ml
	$(CAMLC) -c $(COMPFLAGS) $<

%.cmx: %.ml
	$(CAMLOPT) -c $(COMPFLAGS) $(OPTCOMPFLAGS) $<

DEP_FILES := st_stubs.b.$(D)
ifneq "$(NATIVE_COMPILER)" "false"
DEP_FILES += st_stubs.n.$(D)
endif

ifeq "$(COMPUTE_DEPS)" "true"
include $(addprefix $(DEPDIR)/, $(DEP_FILES))
endif

%.n.$(O): OC_CPPFLAGS += $(NATIVE_CPPFLAGS)
%.n.$(D): OC_CPPFLAGS += $(NATIVE_CPPFLAGS)

define GEN_RULE
$(DEPDIR)/%.$(1).$(D): %.c | $(DEPDIR)
	$$(DEP_CC) $$(OC_CPPFLAGS) $$(CPPFLAGS) $$< -MT '$$*.$(1).$(O)' -MF $$@
endef

$(foreach object_type, b n, $(eval $(call GEN_RULE,$(object_type))))

.PHONY: depend
depend:
	$(OCAMLRUN) $(ROOTDIR)/boot/ocamlc -depend -slash *.mli *.ml > .depend

include .depend
